iphone - popViewControllerAnimated 和 selectedIndex 的 UITabBarController 旋转问题（iPhone SDK）

Question

这是一个非常重要的自动旋转问题并且很容易重现。

我的应用程序有一个 UITabBarController。每个选项卡都是一个 UINavigationController。自动旋转通过对 shouldAutorotateToInterfaceOrientation 和 didRotateFromInterfaceOrientation 的正常调用来处理。

界面正常旋转，直到我调用 UIViewController.popViewControllerAnimated 并更改 UITabBarController.selectedIndex。

重现步骤：

1. 创建一个演示标签栏应用程序。
2. 将以下代码添加到 App Delegate .h 文件中：

   #import <UIKit/UIKit.h>
   
   @interface TestRotationAppDelegate : NSObject  {
       UIWindow *window;
       UITabBarController *tabBarController;
   }
   
   @property (nonatomic, retain) IBOutlet UIWindow *window;
   @property (nonatomic, retain) IBOutlet UITabBarController *tabBarController;
   
   @end
   
   // Redefine the interface to cach rotation messages
   @interface UITabBarController (TestRotation1AppDelegate)
   
   @end
   

3. 将以下代码添加到 App Delegate .m 文件：

   #import "TestRotationAppDelegate.h"
   
   @implementation TestRotationAppDelegate
   @synthesize window;
   @synthesize tabBarController;
   
   -(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
       [window addSubview:tabBarController.view];
       [window makeKeyAndVisible];
       return YES;
   }
   
   -(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
       return YES;
   }
   
   -(void)dealloc {
       [tabBarController release];
       [window release];
       [super dealloc];
   }
   
   @end
   
   @implementation UITabBarController (TestRotation1AppDelegate)
   
   -(void)viewDidLoad {
       [super viewDidLoad];
       // Add a third tab and push a view 
       UIViewController *view1 = [[[UIViewController alloc] init] autorelease];
       view1.title = @"Third";
       UINavigationController *nav = [[[UINavigationController alloc] initWithRootViewController:view1] autorelease];
       NSMutableArray *array = [[NSMutableArray alloc] init];
       [array addObjectsFromArray:self.viewControllers];
       [array addObject:nav];
       self.viewControllers = array;
       // Push view2 inside the third tab
       UIViewController *view2 = [[[UIViewController alloc] init] autorelease];
       [nav pushViewController:view2 animated:YES];
       // Create a button to pop view2
       UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
       button.frame = CGRectMake(50, 50, 220, 38);
       [button setTitle:@"Pop this view" forState:UIControlStateNormal];
       [button addTarget:self action:@selector(doAction) forControlEvents:UIControlEventTouchUpInside];
       [view2.view addSubview:button];
   }
   
   -(void) doAction {
       // ROTATION PROBLEM BEGINS HERE
       // Remove one line of code and the problem doesn't occur.
       [self.selectedViewController popViewControllerAnimated:YES];
       self.selectedIndex = 0;
   }
   
   -(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
       return YES;
   }
   
   @end
   

界面自动旋转正常，直到您点击标签 #3 上的按钮。

您的帮助将不胜感激！

Answer 1

iPhone SDK 3.2 解决了这个问题。

使用以前的 SDK 使用 [self.selectedViewController popViewControllerAnimated:NO]。